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View Full Version : Some playing around with high ISO raw files


pdk42
29th March 2017, 09:58 PM
I posted this over on the mu43 forum but thought members here who don't visit that site might be interested. Basically, I thought I'd do some comparisons of high ISO shots between the E-M1 and the E-M1ii at high ISO. Initially I just compared them at ISO 3200 and didn't find much of a difference (E-M1ii slightly better, but not a lot to it). A member there suggest trying it again at higher ISOs and I find some interesting results:

- Whilst ISO 3200 is pretty much identical between the E-M1 and E-M1ii, the same isn't true at 6400, 12800 and 25600 where the E-M1ii definitely pulls ahead

- 6400 and 12800 are actually quite usable if there's not too much fine detail and you take a bit of time with the PP

- Things get better for the E-M1ii is you pull back the left of the tone curve to match the apparent "punchiness" of the E-M1 images

- Even 25600 is more than acceptable in a pinch! I was quite surprised by this since I have always put 1600 as my upper limit. For more critical work I'm still of that view, but I can see myself using these high ISOs if I have to.

It's late and I'm on a slow internet connection so I can't easily post lots of examples just now, but as a taster here is a 100% crop from an ISO 12800 E-M2ii shot. Left if without any processing. Right is with some careful and subtle PP in LR. I plan to try DFine later.

I'll post up more shots later. EDIT: the linked jpg below is 1920x1080 but for some reason, at least in my browser, it shows larger here. I suggest you right click and download the image then view it locally from your PC:

http://www.famillekaye.com/12800.jpg

EDIT2: Added a version with Dfine NR and the full image for comparison:

http://www.famillekaye.com/12800dfine.jpg

http://www.famillekaye.com/12800full.jpg

That last image isn't bad at all. Back in film days I'd have been quite happy with an ISO 400 image that looked like that!